Merge branch 'add_camouflage' into 'master'

Add Camouflage

See merge request core-developers/forge!4268

forge-game/src/main/java/forge/game/ability/ApiType.java

@@ -30,6 +30,7 @@ public enum ApiType {
     Block (BlockEffect.class),
     Bond (BondEffect.class),
     Branch (BranchEffect.class),
+    Camouflage (CamouflageEffect.class),
     ChangeCombatants (ChangeCombatantsEffect.class),
     ChangeTargets (ChangeTargetsEffect.class),
     ChangeText (ChangeTextEffect.class),

forge-game/src/main/java/forge/game/ability/effects/CamouflageEffect.java

@@ -0,0 +1,108 @@
+package forge.game.ability.effects;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import forge.game.ability.AbilityUtils;
+import forge.game.ability.SpellAbilityEffect;
+import forge.game.card.Card;
+import forge.game.card.CardCollection;
+import forge.game.card.CardLists;
+import forge.game.combat.Combat;
+import forge.game.combat.CombatUtil;
+import forge.game.player.Player;
+import forge.game.spellability.SpellAbility;
+import forge.util.Localizer;
+
+public class CamouflageEffect extends SpellAbilityEffect {
+
+    private void randomizeBlockers(SpellAbility sa, Combat combat, Player declarer, Player defender, List<Card> attackers, List<CardCollection> blockerPiles) {
+        CardLists.shuffle(attackers);
+        for (int i = 0; i < attackers.size(); i++) {
+            final Card attacker = attackers.get(i);
+            CardCollection blockers = blockerPiles.get(i);
+
+            // Remove all illegal blockers first
+            for (int j = blockers.size() - 1; j >= 0; j--) {
+                final Card blocker = blockers.get(j);
+                if (!CombatUtil.canBlock(attacker, blocker, combat)) {
+                    blockers.remove(j);
+                }
+            }
+
+            if (attacker.hasKeyword("CARDNAME can't be blocked unless all creatures defending player controls block it.") &&
+                    blockers.size() < defender.getCreaturesInPlay().size() ||
+                    blockers.size() < CombatUtil.needsBlockers(attacker)) {
+                // If not enough remaining creatures to block, don't add them as blocker
+                continue;
+            }
+
+            if (attacker.hasKeyword("CantBeBlockedByAmount GT1") && blockers.size() > 1) {
+                // If no more than one creature can block, order the player to choose one to block
+                Card chosen = declarer.getController().chooseCardsForEffect(blockers, sa,
+                    Localizer.getInstance().getMessage("lblChooseBlockerForAttacker", attacker.toString()), 1, 1, false, null).get(0);
+                combat.addBlocker(attacker, chosen);
+                continue;
+            }
+
+            // Add all remaning blockers normally
+            for (final Card blocker : blockers) {
+                combat.addBlocker(attacker, blocker);
+            }
+        }
+    }
+
+    @Override
+    public void resolve(SpellAbility sa) {
+        Card hostCard = sa.getHostCard();
+        Player declarer = getDefinedPlayersOrTargeted(sa).get(0);
+        Player defender = AbilityUtils.getDefinedPlayers(hostCard, sa.getParam("Defender"), sa).get(0);
+        Combat combat = hostCard.getGame().getCombat();
+        List<Card> attackers = combat.getAttackers();
+        List<CardCollection> blockerPiles = new ArrayList<>();
+
+        if (declarer.isAI()) {
+            // For AI player, just let it declare blockers normally, then randomize it later.
+            declarer.getController().declareBlockers(defender, combat);
+            // Remove all blockers first
+            for (final Card attacker : attackers) {
+                CardCollection blockers = combat.getBlockers(attacker);
+                blockerPiles.add(blockers);
+                for (final Card blocker : blockers) {
+                    combat.removeFromCombat(blocker);
+                }
+            }
+        } else {    // Human player
+            CardCollection pool = new CardCollection(defender.getCreaturesInPlay());
+            // remove all blockers that can't block
+            for (final Card blocker : pool) {
+                if (!CombatUtil.canBlock(blocker)) {
+                    pool.remove(blocker);
+                }
+            }
+            List<Integer> blockedSoFar = new ArrayList<>(Collections.nCopies(pool.size(), 0));
+
+            for (int i = 0; i < attackers.size(); i++) {
+                int size = pool.size();
+                CardCollection blockers = new CardCollection(declarer.getController().chooseCardsForEffect(
+                    pool, sa, Localizer.getInstance().getMessage("lblChooseBlockersForPile", String.valueOf(i + 1)), 0, size, false, null));
+                blockerPiles.add(blockers);
+                // Remove chosen creatures, unless it can block additional attackers
+                for (final Card blocker : blockers) {
+                    int index = pool.indexOf(blocker);
+                    Integer blockedCount = blockedSoFar.get(index) + 1;
+                    if (!blocker.canBlockAny() && blocker.canBlockAdditional() < blockedCount) {
+                        pool.remove(index);
+                        blockedSoFar.remove(index);
+                    } else {
+                        blockedSoFar.set(index, blockedCount);
+                    }
+                }
+            }
+        }
+
+        randomizeBlockers(sa, combat, declarer, defender, attackers, blockerPiles);
+    }
+
+}

forge-game/src/main/java/forge/game/phase/PhaseHandler.java

@@ -653,7 +653,14 @@ public class PhaseHandler implements java.io.Serializable {
             }
             if (combat.isPlayerAttacked(p)) {
                 if (CombatUtil.canBlock(p, combat)) {
-                    whoDeclaresBlockers.getController().declareBlockers(p, combat);
+                    // Replacement effects (for Camouflage)
+                    final Map<AbilityKey, Object> repRunParams = AbilityKey.mapFromAffected(p);
+                    repRunParams.put(AbilityKey.Player, whoDeclaresBlockers);
+                    ReplacementResult repres = game.getReplacementHandler().run(ReplacementType.DeclareBlocker, repRunParams);
+                    if (repres == ReplacementResult.NotReplaced) {
+                        // If not replaced, run normal declare blockers
+                        whoDeclaresBlockers.getController().declareBlockers(p, combat);
+                    }
                 }
             }
             else { continue; }

forge-game/src/main/java/forge/game/replacement/ReplaceDeclareBlocker.java

@@ -0,0 +1,29 @@
+package forge.game.replacement;
+
+import java.util.Map;
+
+import forge.game.ability.AbilityKey;
+import forge.game.card.Card;
+import forge.game.spellability.SpellAbility;
+
+public class ReplaceDeclareBlocker extends ReplacementEffect {
+
+    public ReplaceDeclareBlocker(final Map<String, String> mapParams, final Card host, final boolean intrinsic) {
+        super(mapParams, host, intrinsic);
+    }
+
+    @Override
+    public boolean canReplace(Map<AbilityKey, Object> runParams) {
+        if (!matchesValidParam("ValidPlayer", runParams.get(AbilityKey.Affected))) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public void setReplacingObjects(Map<AbilityKey, Object> runParams, SpellAbility sa) {
+        sa.setReplacingObject(AbilityKey.DefendingPlayer, runParams.get(AbilityKey.Affected));
+        // Here the Player is the one who would declare blockers (may be changed by some Card's effect)
+        sa.setReplacingObject(AbilityKey.Player, runParams.get(AbilityKey.Player));
+    }
+}

forge-game/src/main/java/forge/game/replacement/ReplacementType.java

@@ -21,6 +21,7 @@ public enum ReplacementType {
     CreateToken(ReplaceToken.class),
     DamageDone(ReplaceDamage.class),
     DealtDamage(ReplaceDealtDamage.class),
+    DeclareBlocker(ReplaceDeclareBlocker.class),
     Destroy(ReplaceDestroy.class),
     Discard(ReplaceDiscard.class),
     Draw(ReplaceDraw.class),